<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul
          class="cart-list"
          v-for="cartInfo in cartInfoList"
          :key="cartInfo.id"
        >
          <li class="cart-list-con1">
            <input
              type="checkbox"
              name="chk_list"
              :checked="cartInfo.isChecked === 1"
              @change="
                singleCheckedChange(
                  cartInfo.skuId,
                  cartInfo.isChecked === 1? 0:1
                )
              "
            />
          </li>
          <li class="cart-list-con2">
            <img :src="cartInfo.imgUrl" />
            <div class="item-msg">{{ cartInfo.skuName }}</div>
          </li>
          <li class="cart-list-con3">
            <div class="item-txt">语音升级款</div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{ cartInfo.skuPrice }}</span>
          </li>
          <li class="cart-list-con5">
            <button
              class="mins"
              @click="updateShopNum(cartInfo.skuId, -1)"
              :disabled="cartInfo.skuNum <= 1"
              >-</button
            >
            <input
              autocomplete="off"
              :value="cartInfo.skuNum"
              minnum="1"
              class="itxt"
              @change="
                updateShopNum(
                  cartInfo.skuId,
                  $event.target.value - cartInfo.skuNum
                )
              "
            />
            <button
              class="plus"
              @click="updateShopNum(cartInfo.skuId, 1)"
              >+</button
            >
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{ cartInfo.skuNum * cartInfo.skuPrice }}</span>
          </li>
          <li class="cart-list-con7">
            <a href="#none" class="sindelet" @click="deteleGoods(cartInfo.skuId)">删除</a>
            <br />
            <a href="#none">移到收藏</a>
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input class="chooseAll" type="checkbox" v-model="AllChecked" />
        <span>全选</span>
      </div>
      <div class="option">
        <a href="#none">删除选中的商品</a>
        <a href="#none">移到我的关注</a>
        <a href="#none">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">
          已选择 <span>{{ goodsAllnum }}</span
          >件商品
        </div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{ goodsAllPrice }}</i>
        </div>
        <div class="sumbtn">
          <a class="sum-btn" href="###" target="_blank">结算</a>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import {
  getShopCartRequest,
  getAddToCartRequest,
  getChangeSingleCheckedRequest,
  shopCartAllCheckedRequest,
  deleteGoodsRequest,
  deleteAllGoodsRequest,
  } from '@/api'

  export default {
    name: 'ShopCart',
    data(){
      return{
        ShopCartList:[]
      }
    },
    mounted(){
      this.getShopCartList()
    },
    computed:{
      //通过计算属性拿到需要的值
      cartInfoList(){
        //需要加？可选链，否则刚进去会报错，因为没有数据
        return this.ShopCartList[0]?.cartInfoList || []
      },

      //计算得到已选择商品的总数量
      goodsAllnum(){
        return this.cartInfoList.reduce((p,c)=>  p + (c.isChecked===1? c.skuNum:0) ,0)
      },

      //计算总价格
      goodsAllPrice(){
        return this.cartInfoList.reduce((p,c)=>{return c.isChecked === 1? p + c.skuNum*c.skuPrice : p},0)
      },

      //判断是否全选
      AllChecked:{
        get(){
          return this.cartInfoList.every((item)=>{
            return item.isChecked === 1
          })
        },
      //点击全选逻辑
       async set(isChecked){
          //购物车的所有数据都是由id组成，发送给后台
          //所以遍历数据每一项，通过累加的方式，把所有id加到空数组中，然后返回。
          const skuIdList = this.cartInfoList.reduce((p,c)=>{
              //添加每一项的id到数组中,p是当前数组
              p.push(c.skuId);
              return p;
          },[])
          
          //发送请求
          await shopCartAllCheckedRequest(isChecked? 1:0,skuIdList)

        //重新发送请求
        this.getShopCartList()
        }
      },

    },
    methods:{
      //购物车数据请求
     async getShopCartList(){
      const re = await getShopCartRequest()
      this.ShopCartList = re
      },

      //购物车商品的加减
      async updateShopNum(skuId,skuNum){
        await getAddToCartRequest({
          skuId,
          skuNum
        })
       //重新发送请求
      this.getShopCartList()
      },

    //单选框的状态修改
      async singleCheckedChange(skuId, isChecked){
        console.log(skuId, isChecked);
        await getChangeSingleCheckedRequest({skuId, isChecked})
        //重新发送请求
        this.getShopCartList()
    },
    
    //删除单个商品
    async deteleGoods(skuId){
       await deleteGoodsRequest(skuId)

      //重新发送请求
      this.getShopCartList()
    },

    //删除购物车所有商品(暂时接口有问题)
   async deleteAllGoods(){

      const skuIdList = this.cartInfoList.reduce((p,c)=>{
        p.push(c.skuId);
        return p
      },[])

      await deleteAllGoodsRequest(skuIdList)
    }
  }
}
</script>

<style lang="less" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;

  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }

  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;

      & > div {
        float: left;
      }

      .cart-th1 {
        width: 25%;

        input {
          vertical-align: middle;
        }

        span {
          vertical-align: middle;
        }
      }

      .cart-th2 {
        width: 25%;
      }

      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;
      }
    }

    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;

      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;

        & > li {
          float: left;
        }

        .cart-list-con1 {
          width: 4.1667%;
        }

        .cart-list-con2 {
          width: 25%;

          img {
            width: 82px;
            height: 82px;
            float: left;
          }

          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }

        .cart-list-con3 {
          width: 20.8333%;

          .item-txt {
            text-align: center;
          }
        }

        .cart-list-con4 {
          width: 12.5%;
        }

        .cart-list-con5 {
          width: 12.5%;

          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }

          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 33px;
            float: left;
            text-align: center;
            font-size: 14px;
          }

          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
        }

        .cart-list-con6 {
          width: 12.5%;

          .sum {
            font-size: 16px;
          }
        }

        .cart-list-con7 {
          width: 12.5%;

          a {
            color: #666;
          }
        }
      }
    }
  }

  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;

    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;

      span {
        vertical-align: middle;
      }

      input {
        vertical-align: middle;
      }
    }

    .option {
      padding: 10px;
      overflow: hidden;
      float: left;

      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }

    .money-box {
      float: right;

      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }

      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;

        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }

      .sumbtn {
        float: right;

        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: "Microsoft YaHei";
          background: #e1251b;
          overflow: hidden;
        }
      }
    }
  }
}
</style>